Since search didn't work... Why is K&N frowned upon...

[OneSlowTow]

for the PSDs? Is it the oil and the suction from the turbo that are causing problems? Buddy has ran one on his 91 Cummins for well over 100K w/o a problem and he's running 36psi... Just curious since the owner of this truck just bought a K&N cold air kit, and I had mention some people on here were against them, yet I didn't have a clue why though. So I figure I might as well find out!

Thanks.

Oh, and as title states, I tried searching. No results for K&N in posts or threads, and same with K & N

[Banshee34]

Let me see if I can find it for you!

[szyd]

I think it is only the drop in and poor maintnance. Letting dust particles thru to turbo dusting turbo reducing the life of turbo. SAND BLASTING the vanes. I not sure

[rednek01]

Basically it does not filter well enough and has left many members on here with what they call a "dusted turbo". Which means the vanes on the turbo aren't as sharp as they were new because the particles getting by the filter are kind of sanding down the vanes.


Hope that helps

[rednek01]

haha I got beat to it!

[Banshee34]

Here:

ISO 5011 Duramax Air Filter Test Report

I know it says Duramax, but the filters are all made the same just different styles.

[OneSlowTow]

So even the full kit, not just the drop in, is advised against?

We're full aware of dusting heh The stock one is nicely dusted, and chipped! Not horrible, but if you check out my other thread's last post by me, there's a pic showing it

[JMart]

The drop in replacements dont seat properly. I have had the gaskets peal themselves off.

[OneSlowTow]

Man, that was quite an amazing read O_O So does AC offer a filter like the FIL6637 (I think that's it) that we can make our own CAI with? >_> I have a feeling my friend (this truck's owner) still will be slightly bull headed and not return the CAI, since it hasn't even arrived yet. I'll do what I can to persuade him, but I have little success when convincing him to do something logical -_-

Thanks for that link!

[cchase]

All oil filters are not recomended in diesels because of the suction they create, they suck the oil out of the filter thus compermising its abilty to filter